Abiezee jameson



Iginil* faire" strnt -ffira Leners Patent No. 77,289, daad April 28,1868.

IMrEovEi/LENT IN vIsEs.

v che rlgehnle rentrait it tipa tetta ttnit mit mating :glitt at tige tante.

TO ALL WHOM IT MAY CONCERN: y j

Be it known that I, ABIEZER JAMESON, of Trenton, New Jersey,.have invented certain Improvements in Vises; and I do hereby declare the following to be a full, clear, and exact description of the same.

My invention consists- First, of certain jaws arranged to slide on-a plate, and so adapted to' the same that they will be iirmly fastened to the said plate by and during the act 'of securing an object between the jaws, all substantially as described hereafter. The object of this part of my invention isto alibi-d facilities for the ready adjustment of the vise from and towards the operator, and for securing the vise after adjustment. v

Second, in the combinationI of the said sliding jaws with a m'ovable'plate and a permanent plate, all being constructed and arranged substantially as described hereafter. so that the ,said jaws `will admit of both Alateral and longitudinal adjustment. l

v In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation, reference being had to the accompanying drawing, in .which- Figure 1 lis a longitudinal section of my improved vise,

l Figure 2 a plan View,

Figure 3 a part of fig. 2,

Figure 4 a transverse section on the line 1 2, fig. 1, A

Figure 5 an exterior view of the vise, showing a modification of the same,'and

Figure a vertical section on the line 3 4, iig. 5.

0n reference to figs. 1, 2, 3, and 4, Auand A', the two jaws of the vise, have, at their lower ends, ribs a a, adapted to grooves in the opposite edges of a. plate, B, on which the jaws can,l slide to and fro freely.-

A 1eelt, 6, passes through an elongated slot, e, in the plate B, and through a similar slot,f, in an under plate, D, the latter being secured to the table or bench E in any suitable manner;

In connection with the two jaws, I use a screw, F, provided at the outer end with a suitable handle, h, one portion of the screw being larger in diameter than the other, the larger portion having a left-'handed thread adapted to an internal `thread in the jaw A', and the smaller .portion of the screw a right-handed thread, adapted to a corresponding thread in the jaw A. By this arrangement the jaws can be moved simultaneously fromand toward each other, the openingand closing being eii`ected more rapidly than by the usual single screw.

As long as no object is grasped by and between the jaws of the vise, they can be moved to and fro freely on the plate B, and thus adjusted to any desired position. On'sccuring any object between the jaws, however, by operating the screw, there is a tendencyof the lower ends of the jaws to approach each other, and consce quently the ribs a become so tightly jammed in the grooves ofthe plate B that thejaws are as secure as though bolted to the table this securing of thejaws being thus accomplished by and during the simple act of operating the screw for the purpose of causing the jaws to grasp any object.

`Independently of this facility of adjusting the jaws longitudinally on the plate B, the latter, after loosenA ing the nut of the bolt d, may beA turned at any desired angle on the plate D, or moved longitudinally on the said plate, as circumstances may suggest, the two plates being secured together after adjustment by tightening v the nut of the said bolt Z1.- If desired, however, the under plate B may be dispensed with, and a single plate, B', on which 'the jaws are arranged to slide, may be secured directly to the bench, as seen in gs 5 and. In this case the jaws admit of no adjustment, excepting a longitudinal' one ou the said plateB. l Y

One or other of thcja'wsjrnay be provided with a set-screw, t, iig. 4, to be. used for maintaining the jawsin a positionto which they have been adjusted, providing it be desirable to retain them in one position, while the object to be operatedon has to be removed and replaced.

I claim as my invention, and desire to secure by Letters Patent-- 1. The combination of a plate, B, jaws A A', und screw'F, connecting the said jaws, the whole being arranged and operating substantially as and for the purpose specified.

2. 'The combination of the said 4sliding jaws 'A and A', movable plate B, and lower permanent plate D, the Whole being constructed and arranged for the lateral and longitudinal adjustment of the jaws, substantially `as herein described.

In testimony whereof, I have signed myname to this speciction in the presence of two subscribing witnesses,

ABIEZER JAMESON,

Witnesses:

JOHN WHITE, 4 vW. J. R. DELANY" 

